260 
Psyche 
[Vol. 93 
0, 2 mm 
Fig. 3: Volsellae and laciniae of Epimyrma a: Population no. 14 ( E . kraus- 
sei)\ b: Pop. no. 19 ( E.foreli)\ c: Pop. no. 5a (E. vandeli)\ d: E. ravouxi from Corsica. 
populations the anterior border becomes shorter until the discoidal 
cell is triangular. 
Shape of the petioli in $$ and 99 
In several publications (e.g. Menozzi 1931, Sadil 1953) the pro- 
files of 9 and 9 petioli and postpetioli were used as the most impor- 
tant characters for the determination of Epimyrma species. Kutter 
(1973), however, clearly demonstrated with 92 from a single E. 
ravouxi colony that these profiles may vary to such an extent that 
they are useless for species discrimination. 
Nevertheless, we again studied this character, using a slightly 
modified method of Wehner (1983). The outlines of the petioli of 10 
99 and 10 $9 (exceptions: Population 12b: 5 99 > and population 
5a: 399 ) P er population were drawn with the aid of a Wild M5 
